In the summer of 1864, the Confederate States of America was reeling from a series of defeats that would ultimately lead to its demise. Despite the Union victory at Gettysburg in 1863 that turned the Army of Northern Virginia back and the capture of Vicksburg that gave the Union control of the Mississippi River, the outcome of the Civil War was anything but assured.  After leading the Union Army at the Siege of Vicksburg and his subsequent win at Chattanooga, Ulysses S. Grant was promoted...